A tropic can refer to:

In geography, either of two circles of latitude

Circle of latitude

A circle of latitude, on the Earth, is an imaginary east-west circle connecting all locations that share a given latitude...

:

• Tropic of Cancer
  Tropic of Cancer
  The Tropic of Cancer, also referred to as the Northern tropic, is the circle of latitude on the Earth that marks the most northerly position at which the Sun may appear directly overhead at its zenith...
  
  , at 23° 26' 16"
  Degree (angle)
  A degree , usually denoted by ° , is a measurement of plane angle, representing 1⁄360 of a full rotation; one degree is equivalent to π/180 radians...
  
   N
• Tropic of Capricorn
  Tropic of Capricorn
  The Tropic of Capricorn, or Southern tropic, marks the most southerly latitude on the Earth at which the Sun can be directly overhead. This event occurs at the December solstice, when the southern hemisphere is tilted towards the Sun to its maximum extent.Tropic of Capricorn is one of the five...
  
  , at 23° 26' 16"
  Degree (angle)
  A degree , usually denoted by ° , is a measurement of plane angle, representing 1⁄360 of a full rotation; one degree is equivalent to π/180 radians...
  
   S

So that a person or location said to be "in the tropics" is situated south of the Tropic of Cancer and north of the Tropic of Capricorn.

• Tropics
  Tropics
  The tropics is a region of the Earth surrounding the Equator. It is limited in latitude by the Tropic of Cancer in the northern hemisphere at approximately  N and the Tropic of Capricorn in the southern hemisphere at  S; these latitudes correspond to the axial tilt of the Earth...
  
  , referring to the tropical regions of the world.
• Tropic, Florida
  Tropic, Florida
  Tropic is an unincorporated area in Brevard County, Florida, United States. It is the southernmost area on Merritt Island, and its identity was absorbed into the census-designated place of Merritt Island during the Space Age of the 1950s and '60s...
  
  , a town in the United States
• Tropic, Utah
  Tropic, Utah
  Tropic is a town in Garfield County, Utah, United States, along Utah Scenic Byway 12. As of the 2000 census, the town had a total population of 508...
  
  , a town in the United States

In transportation:

• SS Tropic (1871)
  SS Tropic (1871)
  The SS Tropic was a steamship operated by the White Star Line. Built in 1871 by shipbuilders Thos. Royden & Co, the 2,122 gross-ton vessel operated on the Liverpool to Calcutta run in 1871, and in 1872 began serving South American ports from Liverpool. In 1873, the ship was sold to Serra y Font,...
  
  
• SS Tropic (1904)

In Biology, a hormone that regulates other endocrine glands:

• Tropic hormone
  Tropic hormone
  Tropic hormones are hormones that have other endocrine glands as their target. Most tropic hormones are produced and secreted by the anterior pituitary...
  
  
• Non-tropic hormone
  Non-tropic hormone
  Non-tropic hormones are hormones that directly stimulate target cells to induce effects. This differs from the tropic hormones, which act on another endocrine gland....
  
  

In linguistics and philosophy of history, see

• trope
• Trope (philosophy)
  Trope (philosophy)
  The term "trope" is both a term which denotes figurative and metaphorical language and one which has been used in various technical senses. The term trope derives from the Greek τρόπος , "a turn, a change", related to the root of the verb τρέπειν , "to turn, to direct, to alter, to change"; this...
  
  

other examples like:

• Isotropic
• neurotropic
• musculotropic
• chronotropic
  Chronotropic
  Chronotropic effects are those that change the heart rate.Chronotropic drugs may change the heart rate by affecting the nerves controlling the heart, or by changing the rhythm produced by the sinoatrial node...
  
  
• dromotropic
  Dromotropic
  Derives from the Greek word "Dromos", meaning running, a course, a race. A dromotropic agent is one which affects the conduction speed in the AV node, and subsequently the rate of electrical impulses in the heart....
  
  
• inotropic